sound/pci/ctxfi/ctpcm.c

Source file repositories/reference/linux-study-clean/sound/pci/ctxfi/ctpcm.c

File Facts

System
Linux kernel
Corpus path
sound/pci/ctxfi/ctpcm.c
Extension
.c
Size
11811 bytes
Lines
477
Domain
Driver Families
Bucket
sound/pci
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved.
 *
 * @File	ctpcm.c
 *
 * @Brief
 * This file contains the definition of the pcm device functions.
 *
 * @Author	Liu Chun
 * @Date 	Apr 2 2008
 */

#include "ctpcm.h"
#include "cttimer.h"
#include <linux/slab.h>
#include <sound/pcm.h>

/* Hardware descriptions for playback */
static const struct snd_pcm_hardware ct_pcm_playback_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_MMAP_VALID |
				   SNDRV_PCM_INFO_PAUSE),
	.formats		= (SNDRV_PCM_FMTBIT_U8 |
				   SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S24_3LE |
				   SNDRV_PCM_FMTBIT_S32_LE |
				   SNDRV_PCM_FMTBIT_FLOAT_LE),
	.rates			= (SNDRV_PCM_RATE_CONTINUOUS |
				   SNDRV_PCM_RATE_8000_192000),
	.rate_min		= 8000,
	.rate_max		= 192000,
	.channels_min		= 1,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= (64),
	.period_bytes_max	= (128*1024),
	.periods_min		= 2,
	.periods_max		= 1024,
	.fifo_size		= 0,
};

static const struct snd_pcm_hardware ct_spdif_passthru_playback_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_MMAP_VALID |
				   SNDRV_PCM_INFO_PAUSE),
	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
	.rates			= (SNDRV_PCM_RATE_48000 |
				   SNDRV_PCM_RATE_44100 |
				   SNDRV_PCM_RATE_32000),
	.rate_min		= 32000,
	.rate_max		= 48000,
	.channels_min		= 2,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= (64),
	.period_bytes_max	= (128*1024),
	.periods_min		= 2,
	.periods_max		= 1024,
	.fifo_size		= 0,
};

/* Hardware descriptions for capture */
static const struct snd_pcm_hardware ct_pcm_capture_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_PAUSE |
				   SNDRV_PCM_INFO_MMAP_VALID),
	.formats		= (SNDRV_PCM_FMTBIT_U8 |
				   SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S24_3LE |
				   SNDRV_PCM_FMTBIT_S32_LE |
				   SNDRV_PCM_FMTBIT_FLOAT_LE),
	.rates			= (SNDRV_PCM_RATE_CONTINUOUS |
				   SNDRV_PCM_RATE_8000_96000),
	.rate_min		= 8000,
	.rate_max		= 96000,
	.channels_min		= 1,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= (384),
	.period_bytes_max	= (64*1024),
	.periods_min		= 2,
	.periods_max		= 1024,
	.fifo_size		= 0,

Annotation

Implementation Notes